Consider the diagram given below. Parts labelled as A, B, C, D, E and F respectively indicate.

The hip bone is made up of the bones ilium, ischium and pubis. The sacrum is the bone that is jointed with the hip bone to form the pelvis. The pubis or pubic bone is the bone at the bottom and in front of the pelvis in the pubic area. The head of the femur bone whose head fits into the cavity of the pelvic girdle. It is the thigh bone which is the longest bone of the body. The bone forming the inner lower leg is called tibia and the bone forming outer lower leg is fibula. So, the correct option is D.